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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

6 results found.

  1. Konus-Wind observation of GRB 160113A
  2. IPN Triangulation of GRB 160113A
  3. GRB 160113A: Swift-XRT observations
  4. GRB 160113A: Fermi GBM detection
  5. GRB 160113A: Swift ToO observations
  6. GRB 160113A: iPTF P48 Observations and Optical Transient Candidates

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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